Jack



s. SANTINO.

JACK. APPLICATION FILED SEPT- 12, 1919- 2 $HEETS-SHEET 1.

Patented May 11, 1920.

S. SANTINO.

JACK.

APPLICATION FILED SEPT. 12, 1919.

Patented May 11, 1920.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

SALVATORE SANTINO, OF CHICAGO, ILLINOIS, ASSIGNOR T0 :LOUIS CHICAGO,ILLINOIS.

JACK.

C. HERMAN, OF

Patented May 11, .1920,

Application filed September 12, 1919. Serial No. 323,306.

To all whom it may concern:

Be it known that I, SALVATORE SANTINo, a citizen of the United States,and a resident of the city of Chicago, county of Cook, and State ofIllinois, have invented certain new and useful Improvements in Jacks, ofwhich the following is a specification.

My invention relates to jacks, and has for one of its objects, theprovision of a simple and efficient jack capable of easyand quickoperation.

A further object is the provision .of a simple and ellicient jackadapted for operating step by step both in its lifting and loweringoperations.

A still further object is the provision of a jack having quick returnmeans which cannot be operated except when there is no load on the jack.

Other objects will appear hereinafter.

An embodiment of my invention is shown in the accompanying drawingsforming a part of this specification, and in which,

Figure 1 is a side view of a ack embodying my invention,

Fig. 2 is an edge View of the same,

Fig. 8 is a fragmentary view showing a cam-operating lever of thedevice,

Fig. 1 is a vertical section showing the interior parts of the device, 7

Figs. 5 and 6 are sections taken on lines 5-5 and 66, respectively, ofFig. 4, and

Figs. 7 8 and 9 are fragmentary sections showing the same parts invarious positions.

Referring more particularly to the drawings, a base 10 is provided witha cross shaped, in cross section, opening 11 reaching down from its topand in which is disposed the lower end of an upright bar 12. Thecross-shaped opening 11 is provided so that the upright bar 12 can bedisposed in two positions in the opening 11 at right angles to eachother. This arran ement will be useful for many purposes. pin 13 isinserted through suitable perforations in base 10 for holding the bar 12in the opening 11 in either of the bars positions therein. The base 10is also provided with a horizontal opening 14, see Fig. 4, for theinsertion of bar 12 in a horizontal manner, so that the device may beused as a vise or various other purposes which will be apparent to theusers thereof. v

Slidably mounted on the bar 12 is an upper member 15 and a lower member16.-

Each' member has an opening substantially fitting the bar 12 so thatthe'members'slide easilyion the bar without unnecessary play. Alever 17is pivoted as at =18 tothe upper member 15 and connectedbya link19-pivotedi as-at r20 and 21, see Fig. 1. The lever 17 preferably hasoneend angular with a short portion thereofextending substantially inalinement with the linkl9 when the members lo and 16 are p-ressed apart,see Figs. 1 and 1.- By providingthis arrangement great leverage is givento the lever providing a-sort of toggle action between the part oflever17 between pivots 18and 20iand the link 19.

The lower member 16 is provided with jaw 22 which has teeth 23 normallyengaging the bar 12. On the link 19 is an arm 24 which engages a spring25. The upper end of the spring bears'against a web 26so as to exert anupward pressure on member 16 about the pivot point 21 to press the jaw22 against the bar 12.

The upper niember lo is providedwith an inclined surface 27 againstwhich-a jawholder 28 rests. A compression spring 29 presses against thelower side of aw-holder 28 and a web 80 so as to'exert pressure upwardlyon the jaw-holder 28, and due to the inclined surface 27, presses thejawholder toward bar 12 so that jaw 31 in-said jaw-holder engages thebar 12. With the parts already described, the springs'25 and 29normallypress the jaws 22 and 31 against the bar 12. Upon ra'ising'lever17, see Figs. 1 and l, the link 19 will exert an upward pull on member16 which tends :to/rock the latter, moving thej aw 22 away from bar 12and drawing the'rmember 16 upwardly on said bar toward member 15. Whenthe upper end of link 19 engages a stop 32 on member 15, lever 17 willbe limited in its upward movement. Then, upon moving the lever 17downwardly, jaw 22 will engage bar 12 again and the downward movement ofthe lever 17 will cause the link and lever to move the member 15upwardly on bar 12. This upward movement of member 15 will causejaw-holder 28 to yield clownwardly against spring 29 and permit jaw 31to slide upwardly on bar 12. The downward movement of lever 17 isarrested when the upper end of link 19 engages a stop 33 on member 15,see Fig. 4. It will be seen that lifting movement of. the jack isautomatic upon operating lever 17 without the manipulation of any otherparts of the jack.

To lower a load with the jack, it is necessary to disengage the jaws 22and 31 from the bar 12 at proper times. On member 16 is an arm 34 whichextends upwardly through an opening 35 into a chamber 36 in member 15.In the member 15 is j ournaled a shaft 37 which has a plurality of cams38, 39 and 40 thereon. The shaft 37 is provided with an enlarged part 41which is journaled in one side of member 15 and provided with a springwasher 42 at its other end bearing on the other side of member 15 toprovide a frictional lock for-said shaft. The frictional lock isdesirable for holding the shaft against the forces which will be placedagainstthe cams 38, 39 and 40 in use.

The cams 38 and 39 are formed on shaft 37 in a position to be rockedagainst arm 34, and cam 40 is positioned on shaft 37 where it willengage an arm 43 on the lower part of jaw-holder 28. The shaft 37 isprovided with a handle 44 by means of which it can be oscillatedmanually. \Vhen the handle 44 is moved manually to the positionindicated in Fig. 9, it will be apparent that cam 40 is engaged againstarm 43 and cam 38 engaged against arm 34 to move both jaws 22 and 31from bar 12. In this position the members 15 and 16, and the partsthereon, may be moved up and down the bar 12 freely as desired. It willbe noted, however, that if a load is on the jack, it will be impossibleto move lever 44 from positions such as indicated in Figs. 4, 7 and 8,because the load would hold one of said jaws so tightly against the bar12 that lever 44 could not be moved. It is only when no load is on thejack that both jaws 22 and 31 can be moved out of engagement with thebar 12. This prevents a load on the jack from being accidentallydropped.

On one side of arm 34, I provide two shoulders 45 and 46 which areadapted to engage a crank pin 47 which is mounted in lever 44eccentrically to shaft 37. The pin 47 has a shoulder 48 which is adaptedto rest against the outer side of lever 44, see Fig. 3, and is heldnormally in this position by a flat spring 49. The arrangement is suchthat when pin 47 is rotated by a hand lever 50, the spring 49 will stillrest against the flange or flat part 48. On the under side of the flange48 is provided a cam 51 which engages a cam surface 52 in lever 44. Thearrangement is such that when cam 51 registers with cam surface 52,spring 49 presses the pin 47 into the space between shoulders 45 and 46should said shoulders be in proper position, and if the shoulders arenot in proper position, then pin 47 will rest against the surface 53 or54 adjacent said shoulders and slide into the space between saidshoulders as soon as arm 34 is moved sufficiently. When, it is desiredto move the pin 47 out of engagement with the shoulders 45 and 46, thehandle 50 is op erated to rotate the pin 47 thereby sliding cam 51 outof engagement with surface 52 and the end of cam 51 will ride on surfaceon lever 44 to hold the pin47 away from said shoulders. The pin 47 isheld out of the path of said shoulders in using the device for lifting,and in engagement with said shoulders when it is desired to lower aload.

To lower the load, considering the parts 15 and 16 in their relationsindicated in Figs. 1 and 4, lever 50 would first be operated to causepin 47 to move into the paths of shoulders 45 and 46. Then upon upwardmovement of lever 17, arm 34 will move upwardly with member 16 until thepin 47 moves into thespace between shoulders 45 and 46 and engagesshoulder 45 to rock shaft 37 and move cam 39 against arm 34 to free jaw22 from bar 12, see Fig. 8. Upon downward movement of lever 17 the pin47 will engage shoulder 46 and rock shaft 37, bringing cam 40 againstarm 43 and pull the jaw-holder 28 and jaw 31 downwardly to disengage jaw31 from bar 12, see Fig. 7. It will be apparent that the load will beheld by member 16 and jaw 22 while member 15 is being lowered, and thatjaw 31 and member 15 will hold the load while member 16 is beinglowered.

I claim:

1. A jack comprising a bar; upper and lower members slidably mounted onthe bar; a lever pivoted to one member; a link pivoted to the lever andsaid other member; a

jaw in the lower member; a jaw-holder in the upper member; a jaw in thejaw-holder; a shaft in the upper member; cams on said shaft; a pinassociated with said shaft; an arm on the lower member having meansthereon adapted to engage said pin for oscillating the shaft to move theaws away from said bar.

2. A jack comprising a bar; upper and lower members slidably mounted onthe bar; a lever pivoted to one'of the members; a link connecting theother member with said lQVGl'; a shaft in the upper member; cams on theshaft; a jaw-holder in the upper member having a portion adapted toengage a cam on said shaft; an arm on the lower member adapted to engagea cam on said shaft; a crank pin on the shaft; and shoulders on the armadapted to engage the crank pin for oscillating the shaft.

3. A jack comprising a bar; upper and lower members slidably mounted onthe bar; a lever pivoted to one of the members; a link connecting theother member with said lever; a shaft in the upper member; cams on theshaft; a jaw-holder in the upper member having a portion adapted toengage a cam on said shaft; an arm on the lower member adapted to engagea cam on said shaft; a crank pin on the shaft; shoulders on the armadapted to engage the crank pin for oscillating the shaft; and means formoving the crank pin out of engagement with saidlshoulders.

4. A jack comprising a bar; upper and lower members slidably mounted onthe bar; a lever pivoted to one of the members; a link connecting theother member with said lever; a shaft in the upper member; cams on theshaft; a jaw-holder in the upper member having a portion adapted toengage a cam on said shaft; an arm on the lower member adapted to engagea cam on said shaft; a crank pin on the shaft; shoulders on the armadapted to engage the crank pin for oscillating the shaft; and stopsassociated with certain of the movable parts for limiting the movementsof said shoulders with respect to the crank pin.

5. A jack comprising a bar; upper and lower members slidably mounted onthe bar; a lever pivoted to the upper member; a link connecting thelower member with the lever; stops on the upper member in the path ofsaid link adapted to limit the movements of said members toward and awayfrom each other; a spring-pressed jaw-holder in the upper member; ajaw'in the lower member; a jaw in said jaw holder; a spring pressingagainst the lower member and tending to press the jaw in the latteragainst the bar; a shaft in the upper member; cams on the shaft; a crankpin on the shaft; an arm on the lower member; and shoulders on the armadapted upon relative movements of the members to engage said crank pinand oscillate said shaft to engage the cams with the arm and jaw-holderfor moving the jaws, one at a time, away from the bar.

6. A jack comprising a bar; upper and lower members slidably mounted onthe bar; a lever pivoted to one of said members; a link connecting theother member with said lever; a shaft journaled in the upper member;cams on the shaft; a jawholder in the upper member having a portionadapted to engage a cam on said shaft; an arm on the lower memberadapted to engage a cam on said shaft; jaws in the lower member and saidjaw-holder; and a manually operable lever on said shaft for rotating thelatter to bring said cams into engagement with said aw-holder and armfor moving said jaws away from said bar.

7. A jack comprising a bar; upper and lower members slidably mounted onthe bar; a lever pivoted to one of said members; a link connecting theother member with said lever; a shaft journaled in one member; anenlargement on said shaft engaging one side of said member; a spring onthe shaft engaging the other side of said member, said enlargement andspring providing a frictional lock for said shaft; an arm onv the othermember; a jaw holder in the firstmentioned member; cams on said shaftadapted to engage the arm and jaw-holder; and an operative connectionbetween the arm andshaft.

8. A jack comprising a bar; upper and lower members slidably mounted onthe bar; a lever pivoted to one of said members; a link connecting theother member with said lever; a shaft in the upper member frictionallylocked against turning; a plu rality of cams on said shaft; a aw-holderin the upper member; jaws in the jawholder and lower member; an arm onthe lower member; an operative connection between the arm and shaftadapted to rotate the latter and move one of said cams against said armand another of the cams against the j aw-holder for moving the jaws, oneat a time, away from said bar; and a manually operable lever on theshaft adapted to rotate the latter for moving two of said cams againstthe jaw-holder and arm for moving the jaws, both at once, away from thebar.

9. A jack comprising a bar; upper and lower members slidably mounted onsaid bar; a lever and a link connecting said slidable members together;a shaft mounted inone of said members; an arm on the other member;shoulders in said arm; jaws in said members; cams 011 said shaft; acrank pin mounted on said shaft and extending between said shoulders;and means for moving the crank pin out of engagement with saidshoulders.

1Q. A jack comprising a bar; upper and lower members slidably mountedonsaid bar; a lever and a link connecting said members together; a shaftmounted in one of said members; an arm on the other member; shoulders onsaid arm; cams on said shafts; an enlargement on said shaft; a crank pinslidably mounted in said enlargement; a spring engaging said crank pinnormally holding a portion of the latter in the path of said shoulders;means associated with the crank pin for moving the latter out ofengagement with said shoulders.

11. A jack comprising a bar; upper and lower members slidably mounted onsaid bar; a lever and a link connecting said members together; a shaftmounted in one of said members; an arm on the other of said members; ajaw holder in the slidable member having said shaft therein; an arm onthe said jaw holder; cams on said shaft adapted to engage said arms; anda manually operable lever on said shaft for oscillating the latter tomove both of said cams against said arms at the same time.

12. A jack comprising a bar; upper and lower members slidably mounted onsaid &

bar; a lever and a link connecting said members together; a shaft'mounted in one of said members; an arm on the other of said members;jaws in said members; a spring engaging the member having said armthereon normally holding the jaw in said member against the bar; aspring pressed jaw holder in the member having said shaft therein andsupporting the jaw in said member having the shaft therein; an arm onsaid jaw holder; cams on said shaft adapted to engage said arms formoving said jaws out of engagement with said bar;-an enlarge ment onsaid shaft; means engaging said enlargement for causing friction on thelatter; shoulders in the arm on said member; a pin slidably mounted insaid enlargement and adapted to engage said shoulders; and means formoving said pin for disengaging the latter from said shoulders;

In testimony whereof I have signed my name to this spevifioationon this10th day of September, A. D. 1919.

SALVATORE SANT'INO.

